Is it on to use a silicone based machine oil to keep razor threads good?
No lube needed.
I use this on my EJ89. The threads aren't chrome plated and they didn't mesh smoothly with the handle. Given that the threads are the most frequent failure on that razor, I think a little pipe dope on the threads is a good idea. I expect it will work just as well on any other razor. It costs somewhere around $3-4 for a tube, and it's very handy for shower heads, faucet connectors, etc. You can use it instead of Teflon tape.Is it on to use a silicone based machine oil to keep razor threads good?